in CRM 4, there are AppointmentExtensionBase, PhoneCallExtensionBase... tables. But in CRM2011, they seem to be merged into the Base tables (AppointmentBase, PhoneCallBase...) There still exists AccountExtensionBase, ContactExtensionBase in CRM2011.
Is there a limit number of attributes on the Base tables before it starts to create ExtensionBase tabes?
Thanks.